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Modules 1 – 3: Basic Network Connectivity and Communications, 1. During a routine inspection, a technician discovered that software that was, installed on a computer was secretly collecting data about websites that were visited, by users of the computer. Which type of threat is affecting this computer?,  DoS attack,  identity theft,  spyware,  zero-day attack, 2. Which term refers to a network that provides secure access to the corporate, offices by suppliers, customers and collaborators?,  Internet,  intranet,  extranet,  extendednet, 3. A large corporation has modified its network to allow users to access network, resources from their personal laptops and smart phones. Which networking trend, does this describe?,  cloud computing,  online collaboration,  bring your own device,  video conferencing, 4. What is an ISP?,  It is a standards body that develops cabling and wiring standards for, networking.,  It is a protocol that establishes how computers within a local network, communicate.,  It is an organization that enables individuals and businesses to connect to the, Internet.,  It is a networking device that combines the functionality of several different, networking devices in one., 6. An employee at a branch office is creating a quote for a customer. In order to do, this, the employee needs to access confidential pricing information from internal, servers at the Head Office. What type of network would the employee access?,  an intranet,  the Internet,  an extranet,  a local area network, Explanation: Intranet is a term used to refer to a private connection of LANs and, WANs that belongs to an organization. An intranet is designed to be accessible, only by the organization’s members, employees, or others with authorization.

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7. Which statement describes the use of powerline networking technology?,  New “smart” electrical cabling is used to extend an existing home LAN.,  A home LAN is installed without the use of physical cabling.,  A device connects to an existing home LAN using an adapter and an existing, electrical outlet.,  Wireless access points use powerline adapters to distribute data through the, home LAN., Explanation: Powerline networking adds the ability to connect a device to the, network using an adapter wherever there is an electrical outlet. The network uses, existing electrical wiring to send data. It is not a replacement for physical cabling,, but it can add functionality in places where wireless access points cannot be, used or cannot reach devices., 8. A networking technician is working on the wireless network at a medical clinic., The technician accidentally sets up the wireless network so that patients can see the, medical records data of other patients. Which of the four network characteristics, has been violated in this situation?,  fault tolerance,  scalability,  security,  Quality of Service (QoS),  reliability, Explanation: Network security includes protecting the confidentiality of data that, is on the network. In this case, because confidential data has been made, available to unauthorized users, the security characteristic of the network has, failed., 9. Match each characteristic to its corresponding Internet connectivity type. (Not all, options are used.), ITN (Version 7.00) – Basic Network Connectivity and Communications Exam 5, Explanation: DSL is an always-on, high bandwidth connection that runs over, telephone lines. Cable uses the same coaxial cable that carries television signals, into the home to provide Internet access. Dialup telephone is much slower than, either DSL or cable, but is the least expensive option for home users because it, can use any telephone line and a simple modem. Satellite requires a clear line of, sight and is affected by trees and other obstructions. None of these typical home, options use dedicated leased lines such as T1/E1 and T3/E3., 10. What two criteria are used to help select a network medium from various, network media? (Choose two.),  the types of data that need to be prioritized

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, , , , , the cost of the end devices utilized in the network, the distance the selected medium can successfully carry a signal, the number of intermediate devices installed in the network, the environment where the selected medium is to be installed, Explanation: Criteria for choosing a network medium are the distance the, selected medium can successfully carry a signal, the environment in which the, selected medium is to be installed, the amount of data and the speed at which, the data must be transmitted, and the cost of the medium and its installation., , 11. What type of network traffic requires QoS?,  email,  on-line purchasing,  video conferencing,  wiki, 12. A user is implementing security on a small office network. Which two actions, would provide the minimum security requirements for this network? (Choose two.),  implementing a firewall,  installing a wireless network,  installing antivirus software,  implementing an intrusion detection system,  adding a dedicated intrusion prevention device, Explanation: Technically complex security measures such as intrusion prevention, and intrusion prevention systems are usually associated with business networks, rather than home networks. Installing antivirus software, antimalware software,, and implementing a firewall will usually be the minimum requirements for home, networks. Installing a home wireless network will not improve network security,, and will require further security actions to be taken., 13. Passwords can be used to restrict access to all or parts of the Cisco IOS. Select, the modes and interfaces that can be protected with passwords. (Choose three.),  VTY interface,  console interface,  Ethernet interface,  boot IOS mode,  privileged EXEC mode,  router configuration mode, Explanation: Access to the VTY and console interfaces can be restricted using, passwords. Out-of-band management of the router can be restricted in both user, EXEC and privileged EXEC modes., 14. Which interface allows remote management of a Layer 2 switch?,  the AUX interface,  the console port interface

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, , , the switch virtual interface, the first Ethernet port interface, Explanation: In a Layer 2 switch, there is a switch virtual interface (SVI) that, provides a means for remotely managing the device., , 15. What function does pressing the Tab key have when entering a command in, IOS?,  It aborts the current command and returns to configuration mode.,  It exits configuration mode and returns to user EXEC mode.,  It moves the cursor to the beginning of the next line.,  It completes the remainder of a partially typed word in a command., Explanation: Pressing the Tab key after a command has been partially typed will, cause the IOS to complete the rest of the command., 16. While trying to solve a network issue, a technician made multiple changes to the, current router configuration file. The changes did not solve the problem and were, not saved. What action can the technician take to discard the changes and work, with the file in NVRAM?,  Issue the reload command without saving the running configuration.,  Delete the vlan.dat file and reboot the device.,  Close and reopen the terminal emulation software.,  Issue the copy startup-config running-config command., Explanation: The technician does not want to make any mistakes trying to, remove all the changes that were done to the running configuration file. The, solution is to reboot the router without saving the running configuration. The copy, startup-config running-config command does not overwrite the running, configuration file with the configuration file stored in NVRAM, but rather it just has, an additive effect., 17. An administrator uses the Ctrl-Shift-6 key combination on a switch after issuing, the ping command. What is the purpose of using these keystrokes?,  to restart the ping process,  to interrupt the ping process,  to exit to a different configuration mode,  to allow the user to complete the command, Explanation: To interrupt an IOS process such as ping or traceroute, a user, enters the Ctrl-Shift-6 key combination. Tab completes the remainder of, parameters or arguments within a command. To exit from configuration mode to, privileged mode use the Ctrl-Z keystroke. CTRL-R will redisplay the line just, typed, thus making it easier for the user to press Enter and reissue the ping, command., 18. Refer to the exhibit. A network administrator is configuring access

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control to switch SW1. If the administrator uses a console connection to, connect to the switch, which password is needed to access user EXEC, mode?, CCNA-1-v7-Modules-1-3-Basic Network Connectivity and Communications Exam, Answers 14, letmein, secretin,  lineconin,  linevtyin, Explanation: Telnet accesses a network device through the virtual interface, configured with the line VTY command. The password configured under this is, required to access the user EXEC mode. The password configured under the line, console 0 command is required to gain entry through the console port, and the, enable and enable secret passwords are used to allow entry into the privileged, EXEC mode., , , , 19. A technician configures a switch with these commands:, SwitchA(config)# interface vlan 1, SwitchA(config-if)# ip address 192.168.1.1 255.255.255.0, SwitchA(config-if)# no shutdown, What is the technician configuring?,  Telnet access,  SVI,  password encryption,  physical switchport access, Explanation: For a switch to have an IP address, a switch virtual interface must, be configured. This allows the switch to be managed remotely over the network., 20. Which command or key combination allows a user to return to the previous level, in the command hierarchy?,  end,  exit,  Ctrl-Z,  Ctrl-C, Explanation: End and CTRL-Z return the user to the privileged EXEC mode. CtrlC ends a command in process. The exit command returns the user to the, previous level., 21. What are two characteristics of RAM on a Cisco device? (Choose two.)

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, , , , , , RAM provides nonvolatile storage., The configuration that is actively running on the device is stored in RAM., The contents of RAM are lost during a power cycle., RAM is a component in Cisco switches but not in Cisco routers., RAM is able to store multiple versions of IOS and configuration files., Explanation: RAM stores data that is used by the device to support network, operations. The running configuration is stored in RAM. This type of memory is, considered volatile memory because data is lost during a power cycle. Flash, memory stores the IOS and delivers a copy of the IOS into RAM when a device, is powered on. Flash memory is nonvolatile since it retains stored contents, during a loss of power., , 22. Which two host names follow the guidelines for naming conventions on, Cisco IOS devices? (Choose two.),  Branch2!,  RM-3-Switch-2A4,  Floor(15),  HO Floor 17,  SwBranch799, Explanation: Some guidelines for naming conventions are that names should:, Start with a letter, Contain no spaces, End with a letter or digit, Use only letters, digits, and dashes, Be less than 64 characters in length, 23. How is SSH different from Telnet?,  SSH makes connections over the network, whereas Telnet is for out-of-band, access.,  SSH provides security to remote sessions by encrypting messages and using user, authentication. Telnet is considered insecure and sends messages in plaintext.,  SSH requires the use of the PuTTY terminal emulation program. Tera Term, must be used to connect to devices through the use of Telnet.,  SSH must be configured over an active network connection, whereas Telnet is, used to connect to a device from a console connection., Explanation: SSH is the preferred protocol for connecting to a device operating, system over the network because it is much more secure than Telnet. Both SSH, and Telnet are used to connect to devices over the network, and so are both, used in-band. PuTTY and Terra Term can be used to make both SSH and Telnet, connections., 24. An administrator is configuring a switch console port with a password. In what, order will the administrator travel through the IOS modes of operation in order to

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reach the mode in which the configuration commands will be entered? (Not all, options are used.), CCNA-1-v7-Modules-1-3-Basic Network Connectivity and Communications Exam, Answers 24, Explanation: The configuration mode that the administrator first encounters is, user EXEC mode. After the enable command is entered, the next mode is, privileged EXEC mode. From there, the configure terminal command is entered, to move to global configuration mode. Finally, the administrator enters the line, console 0 command to enter the mode in which the configuration will be entered., 25. What are three characteristics of an SVI? (Choose three.),  It is designed as a security protocol to protect switch ports.,  It is not associated with any physical interface on a switch.,  It is a special interface that allows connectivity by different types of media.,  It is required to allow connectivity by any device at any location.,  It provides a means to remotely manage a switch.,  It is associated with VLAN1 by default., Explanation: Switches have one or more switch virtual interfaces (SVIs). SVIs, are created in software since there is no physical hardware associated with them., Virtual interfaces provide a means to remotely manage a switch over a network, that is using IP. Each switch comes with one SVI appearing in the default, configuration “out-of-the-box.” The default SVI interface is VLAN1., 26. What command is used to verify the condition of the switch interfaces, including, the status of the interfaces and a configured IP address?,  ipconfig,  ping,  traceroute,  show ip interface brief, Explanation: The show ip interface brief command is used to display a brief, synopsis of the condition of the device interfaces. The ipconfig command is used, to verify TCP/IP properties on a host. The ping command is used to verify Layer, 3 connectivity. The traceroute command is used to trace the network path from, source to destination., 27. Match the description with the associated IOS mode. (Not all options are used.), 28. Match the definitions to their respective CLI hot keys and shortcuts. (Not all, options are used.), Explanation: The shortcuts with their functions are as follows:, – Tab – Completes the remainder of a partially typed command or keyword

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– Space bar – displays the next screen, – ? – provides context-sensitive help, – Up Arrow – Allows user to scroll backward through former commands, – Ctrl-C – cancels any command currently being entered and returns directly to, privileged EXEC mode, – Ctrl-Shift-6 – Allows the user to interrupt an IOS process such as ping or, traceroute, 29. In the show running-config command, which part of the syntax is represented by, running-config?,  the command,  a keyword,  a variable,  a prompt, Explanation: The first part of the syntax, show, is the command, and the second, part of the syntax, running-config, is the keyword. The keyword specifies what, should be displayed as the output of the show command., 30. After making configuration changes on a Cisco switch, a network administrator, issues a copy running-config startup-config command. What is the result of issuing, this command?,  The new configuration will be stored in flash memory.,  The new configuration will be loaded if the switch is restarted.,  The current IOS file will be replaced with the newly configured file.,  The configuration changes will be removed and the original configuration will, be restored., Explanation: With the copy running-config startup-config command, the content, of the current operating configuration replaces the startup configuration file, stored in NVRAM. The configuration file saved in NVRAM will be loaded when, the device is restarted., 31. What command will prevent all unencrypted passwords from displaying in plain, text in a configuration file?,  (config)# enable password secret,  (config)# enable secret Secret_Password,  (config-line)# password secret,  (config)# service password-encryption,  (config)# enable secret Encrypted_Password, Explanation: To prevent all configured passwords from appearing in plain text in, configuration files, an administrator can execute the service password-encryption, command. This command encrypts all configured passwords in the configuration, file.

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32. A network administrator enters the service password-encryption, command into the configuration mode of a router. What does this, command accomplish?,  This command encrypts passwords as they are transmitted across serial WAN, links.,  This command prevents someone from viewing the running configuration, passwords.,  This command enables a strong encryption algorithm for the enable secret, password command.,  This command automatically encrypts passwords in configuration files that are, currently stored in NVRAM.,  This command provides an exclusive encrypted password for external service, personnel who are required to do router maintenance., Explanation: The startup-config and running-config files display most passwords, in plaintext. Use the service password-encryption global config command to, encrypt all plaintext passwords in these files., 33. What method can be used by two computers to ensure that packets are not, dropped because too much data is being sent too quickly?,  encapsulation,  flow control,  access method,  response timeout, Explanation: In order for two computers to be able to communicate effectively,, there must be a mechanism that allows both the source and destination to set the, timing of the transmission and receipt of data. Flow control allows for this by, ensuring that data is not sent too fast for it to be received properly., 34. Which statement accurately describes a TCP/IP encapsulation process when a, PC is sending data to the network?,  Data is sent from the internet layer to the network access layer.,  Packets are sent from the network access layer to the transport layer.,  Segments are sent from the transport layer to the internet layer.,  Frames are sent from the network access layer to the internet layer., Explanation: When the data is traveling from the PC to the network, the transport, layer sends segments to the internet layer. The internet layer sends packets to, the network access layer, which creates frames and then converts the frames to, bits. The bits are released to the network media., 35. What three application layer protocols are part of the TCP/IP protocol suite?, (Choose three.),  ARP,  DHCP

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, , , , , DNS, FTP, NAT, PPP, Explanation: DNS, DHCP, and FTP are all application layer protocols in the, TCP/IP protocol suite. ARP and PPP are network access layer protocols, and, NAT is an internet layer protocol in the TCP/IP protocol suite., 36. Match the description to the organization. (Not all options are used.), , 37. Which name is assigned to the transport layer PDU?,  bits,  data,  frame,  packet,  segment, Explanation: Application data is passed down the protocol stack on its way to be, transmitted across the network media. During the process, various protocols add, information to it at each level. At each stage of the process, a PDU (protocol data, unit) has a different name to reflect its new functions. The PDUs are named, according to the protocols of the TCP/IP suite:, Data – The general term for the PDU used at the application layer., Segment – transport layer PDU, Packet – network layer PDU, Frame – data link layer PDU, Bits – A physical layer PDU used when physically transmitting data over the, medium, 38. When IPv4 addressing is manually configured on a web server, which property, of the IPv4 configuration identifies the network and host portion for an IPv4, address?,  DNS server address,  subnet mask,  default gateway,  DHCP server address, Explanation: There are several components that need to be entered when, configuring IPv4 for an end device:, IPv4 address – uniquely identifies an end device on the network, Subnet mask – determines the network address portion and host portion for an, IPv4 address, Default gateway – the IP address of the router interface used for communicating, with hosts in another network, DNS server address – the IP address of the Domain Name System (DNS) server

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DHCP server address (if DHCP is used) is not configured manually on end, devices. It will be provided by a DHCP server when an end device requests an IP, address., 39. What process involves placing one PDU inside of another PDU?,  encapsulation,  encoding,  segmentation,  flow control, Explanation: When a message is placed inside of another message, this is, known as encapsulation. On networks, encapsulation takes place when one, protocol data unit is carried inside of the data field of the next lower protocol data, unit., 40. What layer is responsible for routing messages through an internetwork in the, TCP/IP model?,  internet,  transport,  network access,  session, Explanation: The TCP/IP model consists of four layers: application, transport,, internet, and network access. Of these four layers, it is the internet layer that is, responsible for routing messages. The session layer is not part of the TCP/IP, model but is rather part of the OSI model., 41. For the TCP/IP protocol suite, what is the correct order of events when a Telnet, message is being prepared to be sent over the network?, CCNA-1-v7-Modules-1-3-Basic Network Connectivity and Communications Exam, Answers 41, 42. Which PDU format is used when bits are received from the network medium by, the NIC of a host?,  file,  frame,  packet,  segment, Explanation: When received at the physical layer of a host, the bits are formatted, into a frame at the data link layer. A packet is the PDU at the network layer. A, segment is the PDU at the transport layer. A file is a data structure that may be, used at the application layer., 43. Refer to the exhibit. ServerB is attempting to contact HostA. Which two, statements correctly identify the addressing that ServerB will generate in the, process? (Choose two.)

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, , , , , , , ServerB will generate a packet with the destination IP address of RouterB., ServerB will generate a frame with the destination MAC address of SwitchB., ServerB will generate a packet with the destination IP address of RouterA., ServerB will generate a frame with the destination MAC address of RouterB., ServerB will generate a packet with the destination IP address of HostA., ServerB will generate a frame with the destination MAC address of RouterA., Explanation: In order to send data to HostA, ServerB will generate a packet that, contains the IP address of the destination device on the remote network and a, frame that contains the MAC address of the default gateway device on the local, network., , 44. Which method allows a computer to react accordingly when it requests data, from a server and the server takes too long to respond?,  encapsulation,  flow control,  access method,  response timeout, Explanation: If a computer makes a request and does not hear a response within, an acceptable amount of time, the computer assumes that no answer is coming, and reacts accordingly., 45. A web client is receiving a response for a web page from a web server. From the, perspective of the client, what is the correct order of the protocol stack that is used, to decode the received transmission?,  Ethernet, IP, TCP, HTTP,  HTTP, TCP, IP, Ethernet,  Ethernet, TCP, IP, HTTP,  HTTP, Ethernet, IP, TCP, Explanation:, 1. HTTP governs the way that a web server and client interact., 2. TCP manages individual conversations between web servers and clients., 3. IP is responsible for delivery across the best path to the destination., 4. Ethernet takes the packet from IP and formats it for transmission., 46. Which two OSI model layers have the same functionality as a single layer of the, TCP/IP model? (Choose two.),  data link,  network,  physical,  session,  transport

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Explanation: The OSI data link and physical layers together are equivalent to the, TCP/IP network access layer. The OSI transport layer is functionally equivalent, to the TCP/IP transport layer, and the OSI network layer is equivalent to the, TCP/IP internet layer. The OSI application, presentation, and session layers are, functionally equivalent to the application layer within the TCP/IP model., 47. At which layer of the OSI model would a logical address be added during, encapsulation?,  physical layer,  data link layer,  network layer,  transport layer, Explanation: Logical addresses, also known as IP addresses, are added at the, network layer. Physical addresses are edded at the data link layer. Port, addresses are added at the transport layer. No addresses are added at the, physical layer., , , , , , 48. What is a characteristic of multicast messages?, They are sent to a select group of hosts., They are sent to all hosts on a network., They must be acknowledged., They are sent to a single destination., Explanation: Multicast is a one-to-many type of communication. Multicast, messages are addressed to a specific multicast group., , 49. Which statement is correct about network protocols?,  Network protocols define the type of hardware that is used and how it is, mounted in racks.,  They define how messages are exchanged between the source and the destination.,  They all function in the network access layer of TCP/IP.,  They are only required for exchange of messages between devices on remote, networks., Explanation: Network protocols are implemented in hardware, or software, or, both. They interact with each other within different layers of a protocol stack., Protocols have nothing to do with the installation of the network equipment., Network protocols are required to exchange information between source and, destination devices in both local and remote networks., 50. What is an advantage of network devices using open standard protocols?, Network communications is confined to data transfers between devices from, the same vendor.,  A client host and a server running different operating systems can successfully, exchange data.,  Internet access can be controlled by a single ISP in each market., 

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, , Competition and innovation are limited to specific types of products., Explanation: An advantage of network devices implementing open standard, protocols, such as from the TCP/IP suite, is that clients and servers running, different operating systems can communicate with each other. Open standard, protocols facilitate innovation and competition between vendors and across, markets, and can reduce the occurrence of monopolies in networking markets., , 51. Which device performs the function of determining the path that messages, should take through internetworks?,  a router,  a firewall,  a web server,  a DSL modem, Explanation: A router is used to determine the path that the messages should, take through the network. A firewall is used to filter incoming and outgoing traffic., A DSL modem is used to provide Internet connection for a home or an, organization., 52. Open the PT Activity. Perform the tasks in the activity instructions and then, answer the question., , , , , , , What is the IP address of the switch virtual interface (SVI) on Switch0?, 192.168.5.10, 192.168.10.5, 192.168.10.1, 192.168.5.0, Explanation: After the enable command is issued, the show running-configuration, command or the show ip interfaces brief command will display the IP address of, the switch virtual interface (SVI)., , 53. Why would a Layer 2 switch need an IP address?,  to enable the switch to send broadcast frames to attached PCs,  to enable the switch to function as a default gateway,  to enable the switch to be managed remotely,  to enable the switch to receive frames from attached PCs, Explanation: A switch, as a Layer 2 device, does not need an IP address to, transmit frames to attached devices. However, when a switch is accessed, remotely through the network, it must have a Layer 3 address. The IP address, must be applied to a virtual interface rather than to a physical interface. Routers,, not switches, function as default gateways., 54. Refer to the exhibit. An administrator is trying to configure the switch but, receives the error message that is displayed in the exhibit. What is the problem?

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CCNA-1-v7-Modules-1-3-Basic Network Connectivity and Communications Exam, Answers 54, The entire command, configure terminal, must be used., The administrator is already in global configuration mode., The administrator must first enter privileged EXEC mode before issuing the, command.,  The administrator must connect via the console port to access global, configuration mode., Explanation: In order to enter global configuration mode, the command configure, terminal, or a shortened version such as config t, must be entered from privileged, EXEC mode. In this scenario the administrator is in user EXEC mode, as, indicated by the > symbol after the hostname. The administrator would need to, use the enable command to move into privileged EXEC mode before entering the, configure terminal command., , , , , 55. What term describes a network owned by one organization that provides safe, and secure access to individuals who work for a different organization?,  extranet,  cloud,  BYOD,  quality of service, 56. What term describes storing personal files on servers over the internet to, provide access anywhere, anytime, and on any device?,  cloud,  BYOD,  quality of service,  converged network, 57. What term describes a network where one computer can be both client and, server?,  peer-to-peer,  cloud,  BYOD,  quality of service, 58. What term describes a type of network used by people who work from home or, from a small remote office?,  SOHO network,  BYOD,  quality of service,  converged network

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59. What term describes a computing model where server software runs on, dedicated computers?,  client/server,  internet,  intranet,  extranet, 60. What term describes a type of network used by people who work from home or, from a small remote office?,  SOHO network,  internet,  intranet,  extranet, 61. What term describes a technology that allows devices to connect to the LAN, using an electrical outlet?,  powerline networking,  internet,  intranet,  extranet, 62. What term describes a policy that allows network devices to manage the flow of, data to give priority to voice and video?,  quality of service,  internet,  intranet,  extranet, 63. What term describes a private collection of LANs and WANs that belongs to an, organization?,  intranet,  internet,  extranet,  peer-to-peer, 64. What term describes the ability to use personal devices across a business or, campus network?,  BYOD,  internet,  intranet,  extranet, 65. At which OSI layer is a source IP address added to a PDU during the, encapsulation process?,  network layer,  data link layer,  transport layer,  application layer

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66. At which OSI layer is a destination port number added to a PDU during the, encapsulation process?,  transport layer,  data link layer,  network layer,  application layer, 67. At which OSI layer is data added to a PDU during the encapsulation process?,  application layer,  data link layer,  network layer,  transport layer, 68. At which OSI layer is a source IP address added to a PDU during the, encapsulation process?,  network layer,  data link layer,  application layer,  presentation layer, 69. Which of the following is the name for all computers connected to a network that, participate directly in network communication?,  Servers,  Intermediary device,  Host media, 70. At which OSI layer is a destination IP address added to a PDU during the, encapsulation process?,  network layer,  application layer,  transport layer,  presentation layer, 71. At which OSI layer is a source MAC address added to a PDU during the, encapsulation process?,  data link layer,  application layer,  transport layer,  presentation layer, 72. At which OSI layer is a source port number added to a PDU during the, encapsulation process?,  transport layer,  application layer,  network layer,  presentation layer,  data link layer, 73. At which OSI layer is a destination MAC address added to a PDU during the, encapsulation process?

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, , , , , data link layer, transport layer, application layer, network layer, 74. When data is encoded as pulses of light, which media is being used to transmit, the data?,  Wireless,  Fire optic cable,  Copper cable, 75. Which two devices are intermediary devices? (Choose two),  Host,  Router,  Switch,  Servers